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b9590323e2
This PR adds FIPS 140-3 compliant SHA-256 hashing as an alternative to blake3 for multimodal content hashing. This enables vLLM usage in government, healthcare, and financial environments that require FIPS-approved cryptographic algorithms. Changes: - Add _Sha256Hasher wrapper class with consistent interface - Add _Blake3Hasher wrapper class for optional blake3 usage - Add _create_hasher() factory function for hasher selection - Add VLLM_USE_FIPS_HASHING environment variable control - Automatic fallback to SHA-256 when blake3 is unavailable - Add comprehensive test suite for FIPS hashing functionality Fixes #18334 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com> Signed-off-by: yurekami <249254018+yurekami@users.noreply.github.com>